#include <iostream>
#include <thread>

void hello()
{
	std::cout << "Hello Concurrent World\n";
	std::cout << "thread id: " << std::this_thread::get_id() << std::endl;
}

int main()
{
	std::thread t(hello);
	t.join();
	std::cout << std::thread::hardware_concurrency() << std::endl;
	std::cout << "main thread id: " << std::this_thread::get_id() << std::endl;
}